Missing or truncated logs during tail

[lionello]

During cd preview I saw these truncated logs:

…
2026-01-02T17:11:34.149-08:00 cd pulumi         }
2026-01-02T17:11:34.388-08:00 cd pulumi     ~ aws:elasticache/subnetGroup:SubnetGroup: (update)
2026-01-02T17:11:34.388-08:00 cd pulumi       ~ tags   : {
2026-01-02T17:11:34.388-08:00 cd pulumi       ~ tagsAll: {
2026-01-02T17:11:34.512-08:00 cd pulumi     +-pulumi-nodejs:dynamic:Resource: (replace)
…

to confirm, afterwards I did a defang logs:

$ defang logs --since 2026-01-02T17:11:34.388-08:00
 * Showing logs since 2026-01-03T01:11:34.388Z; press Ctrl+C to stop:
 * Using AWS provider from environment variable
 * To view older logs, run: `defang logs --until=2026-01-03T01:11:34.388Z`
2026-01-02T17:11:34.388-08:00  cd pulumi     ~ aws:elasticache/subnetGroup:SubnetGroup: (update)
2026-01-02T17:11:34.388-08:00  cd pulumi         [id=redis-e4b0727]
2026-01-02T17:11:34.388-08:00  cd pulumi         [urn=urn:pulumi:beta::nounly-prod::aws:elasticache/subnetGroup:SubnetGroup::Defang-nounly-prod-beta-redis-11b5f99]
2026-01-02T17:11:34.388-08:00  cd pulumi         [provider=urn:pulumi:beta::nounly-prod::pulumi:providers:aws::default_6_57_0::df7ff5fb-f53a-4336-81bc-77315b590d1f]
2026-01-02T17:11:34.388-08:00  cd pulumi       ~ tags   : {
2026-01-02T17:11:34.388-08:00  cd pulumi           ~ defang:version: "0.6.0-1290-g5a119d38" => "0.6.0-1309-g750edb8d"
2026-01-02T17:11:34.388-08:00  cd pulumi         }
2026-01-02T17:11:34.388-08:00  cd pulumi       ~ tagsAll: {
2026-01-02T17:11:34.388-08:00  cd pulumi           ~ defang:version: "0.6.0-1290-g5a119d38" => "0.6.0-1309-g750edb8d"
2026-01-02T17:11:34.388-08:00  cd pulumi         }
2026-01-02T17:11:34.512-08:00  cd pulumi     +-pulumi-nodejs:dynamic:Resource: (replace)
…

It's possible that the truncated lines (~ tags : { and ~ tagsAll: {) are single log entries with newlines and that the newline handling during tail is different from the handling during logs.

[lionello]

It's seems to be related to tail only, both explicit defang tail and implicit defang cd preview.

While doing defang cd preview in one window and defang tail in another, both missed different logs:

2026-01-05T05:32:35.014-08:00 cd pulumi         networkConfiguration           : {
2026-01-05T05:32:35.014-08:00 cd pulumi             assignPublicIp: false
2026-01-05T05:32:35.014-08:00 cd pulumi             securityGroups: [
2026-01-05T05:32:35.014-08:00 cd pulumi                 [1]: [unknown]
2026-01-05T05:32:35.014-08:00 cd pulumi             subnets       : [unknown]
2026-01-05T05:32:35.014-08:00 cd pulumi         propagateTags                  : "SERVICE"
2026-01-05T05:32:35.014-08:00 cd pulumi         schedulingStrategy             : "REPLICA"
2026-01-05T05:32:35.014-08:00 cd pulumi         tags                           : {
2026-01-05T05:32:35.014-08:00 cd pulumi             etag          : "pldt8juv1w4s"
2026-01-05T05:32:35.014-08:00 cd pulumi         tagsAll                        : {
2026-01-05T05:32:35.014-08:00 cd pulumi         taskDefinition                 : [unknown]

vs

2026-01-05T05:32:35.014-08:00  cd pulumi         networkConfiguration           : {
2026-01-05T05:32:35.014-08:00  cd pulumi             assignPublicIp: false
2026-01-05T05:32:35.014-08:00  cd pulumi             securityGroups: [
2026-01-05T05:32:35.014-08:00  cd pulumi             subnets       : [unknown]
2026-01-05T05:32:35.014-08:00  cd pulumi         propagateTags                  : "SERVICE"
2026-01-05T05:32:35.014-08:00  cd pulumi         schedulingStrategy             : "REPLICA"
2026-01-05T05:32:35.014-08:00  cd pulumi         tags                           : {
2026-01-05T05:32:35.014-08:00  cd pulumi             defang:project: "nounly-prod"
2026-01-05T05:32:35.014-08:00  cd pulumi             etag          : "pldt8juv1w4s"
2026-01-05T05:32:35.014-08:00  cd pulumi         tagsAll                        : {