I just applied experimentals for the second time post Update 9 (on my Epic account set of Phase2 dbl-engineered FSD)
Steps:
1. Fly to Colonel Bris Dekker (closest Engineer that can mod FSD) in a suitable ship (on my Steam Account it was an Anaconda, this time was a T-9 - both cases the FSD equipped were standard engineered 6A)
2. From Outfitting, Stored Modules, I transferred locally the 3x dbl engineered modules
3. Once they arrived i swapped a dbl engineered, i applied the experimental, then swapped the 2nd, applied experimental, swapped the 3rd and applied experimental
Worth noticing: both Steam and Epic accounts are Odyssey enabled and i applied the experimentals in Odissey
I tried to do the same thing for my XB account, but once landed at Bris my game hard crashed to home screen as soon as i tried to open Stored modules in outfitting (to transfer the modules)
The workaround mentioned by @Dragorion seems kinda similar to the steps i posted above - as in i didnt had the FSD equipped on the ship i used to get to Bris.
Thank you for the steps provided, Northpin.
I tried it before the patch of today and I was not able to reproduce your steps with success. Doing that just let me stuck at the same screen in the screenshots I send. I can't get to the mods screen at all. Oh and I tried the other workaround to change to another module and change back to the CG one but with no luck. I was wondering if there is like two different modules ID for each of the FSDs. Maybe there is and mine is the one which can't get the special effect applied. Some friends were able to apply the experimental effects as you but other can't as I and we can't figure out what the void is going on. The only thing I can think now is the possibility of they making another copy of the FSDs with a new ID and this item can't get the EF applied to them.
I gonna try again now after the patch to see if anything changed.
Anyway, thank you again for your contribution and I'll let you know if this issue was fixed.