Teams client issues

Hi, we have been having a few continuous issues with Teams and wanted to see if anyone has the same issues or a resolution? FYI we all use the Teams Windows desktop client and do not have a SBC or anything, we strictly use the Phone system license from O365

1) When a user (most of us) puts someone on hold it takes probably 4-6 seconds to actually put the call on hold and we aren't sure when that even happens....and worse it sometimes takes ~10 seconds to resume the call.  This is particularly frustrating for our receptionist who has trouble with it when multiple calls come in.

2) When a call comes in it shows the name and the # but once we answer the call it just shows the #, we have to manually add the # as a contact with a name for it to show the name and that is obviously too difficult to do with all incoming calls.  SFB didn't have this issue.

Any ideas?