I’ve seen similar threads quite a few times and thought it was on penny stocks or low volume stocks. Or they were on a few days where whole market went crazy.
Recently (on 30th Dec) I had 8 out 9 orders executed instantly and the last one got stuck at processing(Broadcom AVGO). For more than 30 minutes. I cancelled it, created the transaction again and after another 30 minutes I contacted support.
Support was quick to dismiss my query saying it is a low volume stock and this happens, when there is no market makers. I pointed out that the stock is AVGO and linked the latest transactions from NASDAQ/AVGO page where there were hundreds of shares sold/bought every second. So it is an actually very high volume stock…
While still on the chat with the support the trade executed… Taking hours for a very commonly traded big stock is plain unacceptable. Whatever the issue is has to be fixed.