Severe lag/frame drop when placing signs with four lines of text in versions 1.21.10 and 1.21.11

Steps to reproduce the issue

1. Place a sign in the world.

2. Write text filling all four lines on the sign.

3. Observe the game’s performance/frame rate after placing the sign.

Expected result
The game should run smoothly with no significant drop in frame rate, as in version 1.21.8.

Actual result
After placing a sign with four lines of text, the frame rate drops noticeably and severely. This issue did not occur in version 1.21.8. Tested and confirmed that this lag is unrelated to any shader mods; it persists even in a completely vanilla (mod-free) game environment.