Their subreddit paints a similarly bleak picture:
https://www.reddit.com/r/coinomi. Lots of posts of people being unable to spend coins, unable to sync, getting a variety of error messages, etc. The comment section for each of those posts is just filled with spam.
Similar thing happen on their play store (Android) if you sort it's review by newest date. Although Coinomi still have 4.5 stars and play store decide to show old review with 4-5 stars.
I would say it's a good result all round that the wallet has collapsed. A closed source wallet which sends seed phrases over the internet in plain text to Google has no right to continue to exist. I would suggest everyone uses their back ups to sweep their coins to a better wallet.
Any suggestions which multicoin wallet to use instead? One of the main reasons I'm still using Coinomi is because I have had it installed for years. I don't like installing new software (because every app can be a risk). But I guess it's time to move on.
I remember you mention you have hardware wallet. Default software which comes with hardware wallet usually support many altcoin. So if my memory is correct, why don't you just use that hardware wallet?