Hey @shantoshunt, thanks for the additional information. Based on the screenshots you've provided, it seems that the issue you're facing might be caused by the Feather Client mod, rather than the Wurst Client.
I've received multiple reports from Feather Client users experiencing similar problems with the tab menu. It appears that there may be a conflict or issue within the Feather Client code that is causing the tab menu to be broken.
I want to clarify that the Wurst 7.35.2 update does not make any changes related to the tab menu. In fact, Wurst doesn't modify the tab menu at all. I've tested it on my end and I've shown in the screenshot above that it works fine with clean installations of Minecraft and Wurst.
Unfortunately, as the developer of Wurst, I can't fix issues in other people's mods. I would recommend reaching out to the developers of Feather Client and providing them with the information and screenshots you've shared here. They may be able to provide further assistance or investigate the issue.
In the meantime, you may want to consider using Wurst without Feather Client and see if that resolves the problem. I'm sorry that I can't be of more help with this issue, but I hope this at least clarifies the situation for you.