Scheduling a meeting - Specifically time of meetings

Over a month ago, whenever I try to schedule a meeting, some of the times are not available.  They show in the list, but I cannot select them.  For example:  I wanted to schedule a meeting from 12:00PM to 1:00PM.  Every time I select the time, it picks a different time or won't let me.  I have to select a time usually an hour before my meeting starts (sometimes the half hour time works) in order to schedule the meeting.  Sometimes, I can save the meeting and edit it, then it lets me select the real time I want.  But even that is having issues recently.  I also cannot type in the time, like 12:15, won't work.
The work-around is to schedule my meeting to the nearest time it allows me to, then start the meeting at the scheduled time.  I haven't seen any issues with this, but it is frustration that I cannot select the actually meeting time.  Was there a bug introduced within the past 2 months?  I never had issues until about 1 1/2 months ago and I have been using zoom for years.  I feel I am an experienced user. So I don't feel like it is something I am doing wrong.