preheat_kernel behavior is different in the latest version.

[hc-hyun]

In 0.4 version(maybe 0.4.2), loading spinner was not shown when using preheat_kernel options, but in latest version, loading spinner appears whenever connect the page.

I wonder if this action is intended.

• latest

[Voila] Starting buffering for 4ae01cfd-36d2-4825-b8c4-70a1a80be3db:73c707c6-f0dd-4e35-b9e9-96de2aed3dac
[Voila] Using pre-heated kernel: 445d4dfa-7256-4212-a876-040f4d2f299a for fs.ipynb
[Voila] Kernel shutdown: 4ae01cfd-36d2-4825-b8c4-70a1a80be3db
[Voila] WARNING | Notebook fs.ipynb is not trusted
[Voila] Kernel started: 80534875-5e10-4571-828f-5a841a730f8b
[Voila] Kernel pool of fs.ipynb is filled with 1 kernel(s)
[Voila] Connecting to kernel 445d4dfa-7256-4212-a876-040f4d2f299a.

• legacy : no loading spinner

[Voila] Starting buffering for 3fa46628-b3f8-43d3-a384-2b1cc329de3b:e4fc572b-41b1-4cdb-9df8-b10c49a6516c
[Voila] Using pre-heated kernel: 878d1169-045e-4bce-8b5b-1c2d621af449 for fs.ipynb
[Voila] Kernel shutdown: 3fa46628-b3f8-43d3-a384-2b1cc329de3b
[Voila] Connecting to kernel 878d1169-045e-4bce-8b5b-1c2d621af449.
[Voila] WARNING | Notebook fs.ipynb is not trusted
[Voila] Kernel started: 8f26241f-8d6d-4279-bc12-f3e754ffdc29
[Voila] Kernel pool of fs.ipynb is filled with 1 kernel(s)

[trungleduc]

I wonder if this action is intended.

Yes, it is due to the change in the theme loading logic of Voila.