Strange missing support

[neophyl]

Version

2.2.52

Operating system type + version

Windows 10

3D printer brand / version + firmware version (if known)

MK3 modified

Behavior

I have a model where some of the support just doesnt generate. Its strange in that the zig zag pattern and the interface where it meets the part is shown but the connecting support between is missing. Its not a global thing either as there is other support where it is there.

As follows -

The support for the centre is there but the outside rim doesn't have the connecting bits. I have tried removing all the enforcers and just setting auto support, just having the rim enforcer so there is only one in case it was a multiple modifier issue etc but all just does the same.

I'm hoping its just some settings somewhere but I haven't found why yet.

Project File (.3MF) where problem occurs

LG_black_parts.zip

I should add that I just tried the model in Prusa Slicer 2.2.0 with support on build plate only and it slices the support correctly. However I really really like to use the alternating extra perimeters.