UnhandledPromiseRejectionWarning

[giggo]

I get this since a few days:

succesfully connected... subscribing to entities and events
update entities
(node:1117) UnhandledPromiseRejectionWarning: Error: out_of_range
   at Remote IPC Process

(node:1117) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:1117) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
(node:1117) UnhandledPromiseRejectionWarning: Error: out_of_range

Any idea where this is coming from?