7-13-2021 Today I noticed Lightroom Classic has just been updated - simple tutorials appeared as I opened my Library and Develop modules. At the same time, I found that preferences for tools (for example, the invert command for the Radial Filter) had been altered. After exporting some photos, I could not find them in the usual export location. The Export Location in the Export dialog box had been altered. - as well as the Quality setting. I hope Adobe will avoid such "helpful" updates in the future, or at least let us know what settings will be altered. This post is just FYI to alert others who may have this same export problem.
These settings are sticky and one change I've noticed is that Export as preset now counts towards Export as Previous. Is there a possibility that you've used a preset that altered the settings that have stuck?
The Radial tool is one I use all the time, and bar the addition of Texture in this update it hasn't changed. The original default for Radial is Invert off, but it's a sticky setting, so depends on your last use. Right now mine has invert on, because that's how I last used it.