Failed to send chat message when I should perform an action in 1 second

[double-beep]

Sending multiple chat messages in chat doesn't work if the wait period is one second. For example, here's the log for sending three messages:

2020-10-07 14:35:21 DEBUG Room:171 - New fkey retrieved for room xxxxxx is abcdefhijkl
2020-10-07 14:35:22 DEBUG Room:188 - Connecting to chat WebSocket at URL wss://chat.sockets.stackexchange.com/events/blahblahb?l=105104883 for room 215402
2020-10-07 14:35:23 DEBUG Room:212 - WebSocket session successfully opened in room xxxxx.
2020-10-07 14:35:23 INFO  Room:263 - Task added - sending message '1st message' to room xxxxx.
2020-10-07 14:35:23 INFO  Room:263 - Task added - sending message '2nd message' to room xxxxxx.
2020-10-07 14:35:23 INFO  Room:263 - Task added - sending message '3rd message' to room xxxxxx.
2020-10-07 14:35:23 DEBUG Room:475 - Leaving room xxxxxx on STACK_OVERFLOW
2020-10-07 14:35:23 DEBUG Room:277 - Message '1st' sent to room xxxxxx, raw result: {"id":12345678,"time":1602081323}
2020-10-07 14:35:23 DEBUG Room:218 - WebSocket session successfully closed in room xxxxxx.
2020-10-07 14:35:23 DEBUG Room:277 - Message '2nd' sent to room xxxxxx, raw result: {"id":123456,"time":1602081323}
2020-10-07 14:35:23 DEBUG Room:149 - Tried to POST to URL https://chat.stackoverflow.com/chats/215402/messages/new with data [text, 3rd] but was throttled, retrying in 2 seconds
2020-10-07 14:35:25 DEBUG Room:277 - Message '3rd' sent to room xxxxxx, raw result: {"id":12345678,"time":1602081325}

Sometimes, though, it fails with this log:

java.util.concurrent.CompletionException: org.sobotics.chatexchange.chat.ChatOperationException: The chat operation failed with the message: You can perform this action again in 1 second.
        at java.base/java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:314)
        at java.base/java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:319)
        at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1702)
        at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
        at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
        at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
        at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: org.sobotics.chatexchange.chat.ChatOperationException: The chat operation failed with the message: You can perform this action again in 1 second.
        at org.sobotics.chatexchange.chat.Room.post(Room.java:155)
        at org.sobotics.chatexchange.chat.Room.post(Room.java:132)
        at org.sobotics.chatexchange.chat.Room.lambda$send$11(Room.java:276)
        at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1700)
        ... 6 more

This is probably because of this line:

chatexchange/src/main/java/org/sobotics/chatexchange/chat/Room.java

Line 72 in 6fe1bcf

private static final Pattern TRY_AGAIN_PATTERN = Pattern.compile("You can perform this action again in (\\d+) seconds");

1 second doesn't contain s, thus it understands this as a different exception.