Power reading spikes

[friikadello]

Hi!
I had a palm injury and wasn't cycling for a good half year. Couple days ago a decided to pull out my Elite suito out of closet. First things first I did a couple easy Zwift rides all good so far. After one ride when trainer was warmed up I decided to calibrate in Zwift. Turned out you no longer can do it via Zwift. So I thought I need to update Suitos firmware. And that was my biggest mistake. After firmware update my power readings are all over the place. In Zwift I'm doing some light training, for example I'm supposed to go 170w but after firmware update it's jumping all over the place it can show up to 210 and drop to 130w or anything in between in just a second. It's impossible to keep steady anymore. Anyone knows how to fix this? Maybe downgrade firmware?
I don't even want to go into calibration nightmare on that thrash app.

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Power spikes like this?

WhatsApp Image 2020-04-27 at 15.53.14.jpeg (61.96 KiB) Viewed 2586 times

this is an elite training test taken at the end of april