With version 1 chutes vanished, so my current saved game misses more than 1300 entities ... How to fix this?

For everything else i found the respective corresponding mod parts

Can you provide a save that still had the chutes in so I can see the specific combination of mods and settings? I'll get that fixed quickly!

the chutes came from Loaders Modernized, there was an option to enable them, this option has also vanished in the new version ...
Startup Settings -> "Loaders modernized" -> "Enable chute loader" ... enabled by default.

The corresponding code is in loaders-modernized_0.8.14/./prototypes/loader_templates/base.lua line 78

i can't see any dependencies to other mods for the chute, but 5dim's wooden-logistics and boblogistics are having some logic to be aware about the exsitence of the chute.

The setting is still there in the new version in settings.lua but doesn't show in the Settings dialog, very strange

A save would not work really, cause not all mods i use are available online yet.

https://imgur.com/a/AyGgVDp this is what i see in the settings dialog when 1.0.2 is used.

i added also a screenshot with Version 0.8.14 in use.

another effect i recognized is that the option is disabled when i switch back to 0.8.14 ... even if it is not visible in 1.0.2 something happens to it, like disabling it, i need to change it back to the default "enable chute".

i found this in loaders-modernized-bobs_1.0.1/./settings.lua

local chute = data.raw["bool-setting"]["mdrn-enable-chute"]
chute.hidden = true
chute.forced_value = false

it seems this renders chutes unusable when used in combination with bobs logistics

Right. With Bob's basic belts they are the same as a chute, just the chute was cheaper. I'll need to take another look, but I thought I accommodated existing chutes in Bob's games and made them basic loaders.

1) Should there be a chute available when using Bob's with "Basic belts" available?
yes - should it be even slower still than the basic loader that is available without research at the beginning or just a cheaper "version" of the basic loader?
no - Need to take another look at why the existing chutes didn't remain.

the basic belt and loader is faster 7.5 items/second than a chute ... 3.xx something

Should be fixed now. Thanks for the report!