There is a video on YT about this and apparently the screws that hold the bearing in place could have come loose. Check all 3 under the platter.
Could be what it is.
My System:
Turntable - Linn Sondek LP12, Kore, Lingo 4, Roksan NIMA, Lyra Delos Cartridge, Roksan HDC-03 arm lead, Trampolin 2 base, Tiger Paw Vulcan, Denon DCD-A110 Cd player, Tag Mclaren DAC20 Digital to Analogue Converter, SPM Interconnects, Nordost Red Dawn Leif Speaker cable, Spendor S3/5R2 Target R1 speaker Stands, Atacama ECO 60/40 hifi racks, Sennheiser HD565 Ovation headphones