Jigsaw, Sierra, Bookmap, TT, all apps/software, all prone to glitches. Never ever trust an app.
If you're trading with real money, have at least 2 apps connected to your trading account. If one breaks you have the other one to manage the position. Also, have 2 computers, one app in each PC, just in case one PC crashes. Also, have a 4G connection ON in your phone, so you can quickly switch in case your line go down, and lastly have your PC's and router connected to an UPS in case power go down.
Talked to a trader that has his trading accounts connected to 3 different apps, all running the same trading system. This is my life he says, my money, I don't play with my money. If one of the apps crash, I'm relaxed because the other 2 apps are running.
TT is the most used by professionals because they were the pioneers in terms of DOM trading. Back in the day, traders would pay $600 a month to use XTrader. TT has time in their favor, they had all these years to build a robust infrastructure. All the others are recent companies, building now their infrastructure. Clearly targeting the retail traders a market that TT has very little interest since it's not there where the big money resides.