Text on signs may ignore space/newline formatting

I still cannot reproduce using that text in a creative mode testing realm of which I am not the owner, accessed through Windows 10. But, I cannot reproduce any of the new 1.17.30 text bugs either (REALMS-9191, REALMS-9231). I wonder if these are related to specific devices, or multiplayer, or add-ons?

Reproduced with the following sign on a bedrock realm (multiplayer, win10):

My test environment was a survival (normal terrain) realm, Windows 10, not the owner, no add-ons (both realm and client-wise). The world is about 1.3GB and is almost two years old, though this issue has dated back earlier than when I reported.

Both REALMS-9191 and REALMS-9231 are reproducible for me in the same world.

I keep having this issue on and off. Some days it works and others it doesn’t, some days it writes nothing at all and I also have the issue with renaming things!

I think i found the problem. when players write in signs, the sign updates when ever any text is entered. while on my freind's realm, while reading to screenshot my signs to save them in case the signs messed up, i noticed the signs themselves going though the exact process agean, as if the client and server are lagging horribly. durring this process, i notice the sign ignores ALL LINE BREAKS AND ANYTIME YOU SWITCH TO A NEW LINE as if the server was reading the sign as a continuos line of text, and not a multi line text. This is what must be casuing the issue.

Steps to replicate:
1. open any realm.
2, place a sign and write the following: "Dear Dirary," enter "after walking" enter "for 2471" enter "days, nothing".
3, Wait until the sign updates (around 5-10 minutes).
4, Observe the sign reinputing your keystokes.

Expected Results:
Dear Dirary,
after walking
for 2471
days, nothing

Actual Result:
Dear Dirary,
After walking
for 2571 days,
nothing

Proposal soution: make the server code check for sign spaces by detecting "Enter" or controller equivlent move that text to the next line and modify any text below it