Camera is rotating without user interaction

[javagl]

What happened?

When loading a model (e.g. a GLB) at the origin and looking at it, then the camera moves/rotates without any user interaction.

It does not happen when globe:false is set.

It does happen when manually setting the camera with camera.lookAt (unless the target is (0,0,0)), and it also happens when setting viewer.trackedEntity = entity;.

The movement seems to be a bit ... unsteady and "random". In fact, with the sandcastle below, the camera is slowly rotating, and after ~30 seconds, it screws up the orientation in a way so that the model is no longer visible...

Reproduction steps

Do nothing 😁

(After opening the sandcastle below...)

Sandcastle example

https://sandcastle.cesium.com/index.html#c=fVJRa8IwEP4roU8tlEQZe6mdTNzeBmMIewqMtD1dME0kSRU3/O+7JtbplL2Uu8t93333XWujnSdbCTuw5IFo2JE5ONm19D3UUp7UIZ8b7YXUYHmSk2+uCWFspUwFBVkK5YDrQzbhmus6MHZWIR1PKGUL0W4UPAkvWGsaUI7FCTNpj9EHhnSlKp5MBvzGOOml0Zea5sJ6jIS+S0d0lJPhk51wxkpAodfQt054sBrrl9CcjCN+YEC49HsER1NoyCU4KpomDYtr0eLWuGHeZ4PS4hSF8pmQ4jwJj8GHItpIkEn+0h3yk5NHATWOs4IqY9YznwYBtx3BfXCbLCf/9tz3fVmcwNhxhreiXkPzPOweTcCeJE9K5/cKplErIY+y3RgbLpzidT3gddFax6oOKTytnevJ+9aSnUPLRm6JbB5u/FGkVsI5fFl2Si3kF/BkWjLsv4IqIxqpV69bsErs+7bP8fQlFimlJcP0NtIboyph/zD/AA

Environment

Browser: Firefox/Chrome
CesiumJS Version: 1.115