Limit on skipping?

I am not allowed skip forward my hero chest for another hour and a half. This is the first time I’ve ever seen this. Is this normal? I always skip my hero chests when it only cost 1 gem. The last day I did also skip my monster chests so is there a limit of 4 skips per 24 hours?

Yes, normal.
I’m not sure about the specifics of the limit, just that it is there.