For e.g. in Response to 1NT by partner, when it's your turn to bid, & you hover your mouse of 2♣, you get an explanation & that 2♣ is Stayman.
Occasionally, there is no explanation (in a bid where there should be) - you just see "Loading explanations ..." & nothing else happens after that.
I haven't been able to get a screenshot of that but here is a screenshot of what happens after you click anyway on a unexplained bid.
![Posted Image](https://imgur.com/wqsxYeE.png)
If you check this auction, both 1♥ & 2♥ are bids which have a proper explanation. However, for 2♥, it say "loading explanations .." & after I bid 2♥, shows the bidding screen with both the bids not highlighted. Non-highlighted bids are bids where you don't have an explanation. Here in this case, I think there is an explanation for both 1 & 2♥ but it's still not highlighted.
Is this a bug? This occasionally happens for some bids.