The rental shop claimed this is normal and due to the internal cables. I just couldn't believe that could be true and normal as per design.. (?!) Riding free handed was not possible for more than some seconds because the handlebar locked into different off-center positions.
Broken headset bearing? – Rental Bike on Tenerife (See text below)
byu/tobimoto92 inbikewrench
by tobimoto92