Linux - Full Screen doesn't restore selected resolution

I cannot get the linux version of the game to launch in full screen mode at my preferred resolution. This is reproducible 100% of the time.

Steps to reproduce:
* Launch program.
* Switch to windowed mode via the Square button in the upper right.
* Load a game save file.
* Open preferences, "game controller" tab, and scroll down to "Graphics".
* Switch to "Full Screen"
* Switch to non-default resolution.
For me, default is 3840x2160, as I have a HiDPI screen, so I switch to 1920x1080 (1/2 res) to make for a manageable game resolution.
* Note that the game has switched to full screen mode at the correct resolution!
* Quit to desktop
* Launch game again
* Note that game launches in "Windowed Borderless" mode, at the machine native resolution.

Not to overstate the obvious, but I would like the game to launch at the resolution I asked for, in full screen mode, as I asked it to do.

Stardew Valley BuildI 4490827
OS: Pop_OS 19.10 (based on Ubuntu 19.10)
Machine: Dell XPS 9750, 4k screen, Intel UHD Graphics 630 (Coffeelake 3x8 GT2) (Machine has a nvidia card as well but I don't use it for Stardew Valley)

Please let me know if there's more info I can add to help!

 

Did this get to any humans?