I am also experiencing this issue a few times a day. I have the same system model, kernel version, and OS version as @jspiro. I will try changing to a theme with no transparency and follow up if that stops the panics. If not then I will try upgrading to 10.15.2 Beta and testing that.
For removing transparency from the theme, I duplicated the Alfred macOS theme and then set the color to fully opaque for:
window
window border
selected result background
search background
search text
selected search text background
selected search text
Is there anything else I am missing? Or a specific theme from someone else to use? I searched on the forums but did not find anything specifically advertising being fully opaque.
