So I think there's a feedback loop or something weird in the software and/or connection that preventing a crisp connection with a shorter delay.

Can't even bring up the sliding menu/toolbar at the bottom or left side of the screen without waiting a few seconds after tapping in those areas. Then, after the initial slew, the delay persists in Stellarium, on all functions, not just telescope control. When configuring the telescope in Stellarium the default is a 0.5 sec delay, but yikes, 10 seconds is a long way off from that. There is one clear problem - there is massive lag in Stellarium communicating with the mount. In any case, strictly speaking, it does control the mount. I understand that this an equatorial mount and even moving slightly right looks funny on the mount track because of RA and DEC adjustments, but the motion seems a bit much.at least the adjustments could be done in smaller increments rather than large sweeping arcs.

For example, I might select a star a degree of the mount's current location, and it goes on a wild goose chase to move to that spot, moving way down, then way right, then back up. However, it sometimes does it in a really goofy way. Stellarium will control the mount, and will slew to whatever you need it to. This opened up iOptron Commander and I selected the COM port and established the connection. When establishing the connection, it pulled up ASCOM Telescope Chooser, where from the dropdown I selected 'iOptron ASCOM Driver for 2013 and Earlier Mounts'. In Stellarium, connected via ASCOM, not via Stellarium because they don't offer iOptron devices under the 'Device Model' drop down. I'm using Stellarium 0.20.2 with an iOptron ZEQ25GT mount, ASCOM Platform 6.5 and iOptron Commander 3.11.

Telescope control with stellarium