G93 strange behavior

I have found something strange when using G93 on my CNC router that has an A axis. Below are 2 snippets of gcode that have very different behaviors:

In this snippet the last 2 lines result in what looks like rapid moves. It does not obey the feed given. My machine is not actually capable of 0.0002" movement. The smallest movement the Z can do is approximately 0.0005".

Y0. Z1.3005
G93 A178.639 F11.0982
Z1.3003 A357.443 F11.0879
Z1.3005 A360. F773.4857

This snippet behaves as expected.

Y0. Z1.3005
G93 A178.639 F11.0982
A357.443 F11.0879
A360. F773.4857

Has anyone seen this before? Have I just configured something wrong? This gcode is coming from Fusion 360. I have not figured out a way to reliably get rid of these very small Z movements in rotary tool paths. Also interested if anyone knows how to do that.

It moves much faster than that. Pretty sure it is moving at the max speed of the A axis.

I am using 2.9 on debian 12

Thanks for looking at this! For now I think I am going to figure out some sort of script I can run on my gcode that will remove any unnecessary Z moves. I am not very experienced when it comes to scripting but I am sure I can figure it out. Something that finds the starting Z before a G93 and then removes the Z word if it is less than a set amount different. If the difference is larger, use that value as the new Z value to compare against and leave it in.

I actually found a way to limit the places after the decimal for xyz in my post processor to 3 which should work for this situation. For anyone else using Fusion, the change in the post is below.

Change this:
var xyzFormat = createFormat({decimals:(unit == MM ? 3 : 4), forceDecimal:true});

to this:
var xyzFormat = createFormat({decimals:(unit == MM ? 3 : 3), forceDecimal:true});

After a little more investigation, I can also say that a small linear axis move of 0.001" can also cause this behavior.

This does not work:

Y0. Z1.300
G93 A178.639 F11.0982
Z1.301 A357.443 F11.0879
Z1.300 A360. F773.4857

This snippet behaves as expected.

Y0. Z1.300
G93 A178.639 F11.0982
A357.443 F11.0879
A360. F773.4857