Chat BSOD

[MonkestationIssueBot]

Reporting client info: Client Information:
BYOND:515.1642
Key:sorenon

Round ID:

7010

Testmerges:

• [DNM] Plexora
• Theseus
• Bomb-Actualizer
• A singular cooking recipe, and an overhaul of blood, temperature, and pain.
• Signboards!
• Reverts mood change indicators
• Its time to go to heaven my child (Divine Warning)
• [PORTS] Ports portable gravity generator, main gravgen repair text, fixes gravity fields
• Remove snowflake conversion immunities
• Antag selection weighting fixups
• fixes malkavians not getting an objective when another vamp breaks the masquerade
• fix some minor runtimes with bloodsuckers
• [BOUNTY] "Cryptozoologist" and "Paranormal Investigator" alt titles
• Monster Hunters can now see rabbits through walls (+ silver bullets are now a status effect)
• Adjusts crew tracking postions for several postions.
• Makes robotic repairs upgrades actually researchable.
• Removing IPC Organs from medbay's bounty pool
• Adding powercord as a printable cybernetic

Reproduction:

For some reason I haven't been able to identify the chat box went BSOD.
For some reason I have been unable to identify my chat screen went BSOD with this error messsage:

UnhandledRejection: TypeError: Object doesn't support property or method 'startsWith'
at s (http://127.0.0.1:64628/tgui-panel.bundle.js:109:9021)
at R (http://127.0.0.1:64628/tgui-panel.bundle.js:109:21605)
at R (http://127.0.0.1:64628/tgui-panel.bundle.js:109:17508)
at R (http://127.0.0.1:64628/tgui-panel.bundle.js:109:17397)
at Anonymous function (http://127.0.0.1:64628/tgui-panel.bundle.js:109:7134)
at S (http://127.0.0.1:64628/tgui-panel.bundle.js:43:722)
at Y (http://127.0.0.1:64628/tgui-panel.bundle.js:109:6145)
at f (http://127.0.0.1:64628/tgui-panel.bundle.js:1:198699)
at H (http://127.0.0.1:64628/tgui-panel.bundle.js:1:200733)
at Anonymous function (http://127.0.0.1:64628/tgui-panel.bundle.js:1:199227)
User Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.2; WOW64; Trident/7.0; .NET4.0C; .NET4.0E)
State: {"ckey":"sorenon","window":{"fancy":0,"locked":0}}

[Sorenon]

Neither clearing the BYOND cache or updating to 515.1643 from 515.1642 has fixed this issue.
I have been able to switch to the old ui which doesn't crash.

[Sorenon]

Once in-game, using Help/Refresh TGUI fixes the chat without the BSOD but the issue returns whenever the client reconnects to the server.

[Sorenon]

Issue seems to have fixed itself