Select tool selects wrong part due to CanQuery

[YasuYoshida (Yasu)]

Reproduction Steps

You can reproduce this bug by doing the following:

• open a blank baseplate and add in two parts
• set one part’s CanQuery property to false
• position the CanQuery false part behind the other part
• try selecting the CanQuery true part while having the the CanQuery false part directly behind it
• you should notice that you cannot select the CanQuery true part and it selects the other part instead

I’ve created a reproduction file which should make it easy to understand what’s wrong:

CanQuery Selection Bug Reproduction.rbxl (41.2 KB)

Expected Behavior

Instead of selecting the CanQuery false part, the select tool should be selecting the part in front that has CanQuery set to true.

Actual Behavior

When attempting to select the part that has CanQuery set to true, it selects the one behind that has CanQuery set to false. In the demonstration below, you can see that the selection tool is selecting the parts with CanQuery set to false despite having parts in front. The bug itself is only demonstrated in the first two examples. The rest of the examples in the demonstration is the expected behavior.

Issue Area: Studio
Issue Type: Other
Impact: High
Frequency: Constantly
Date First Experienced: 2022-05-14 15:05:00 (-07:00)
Date Last Experienced: 2022-05-16 00:05:00 (-07:00)

[YasuYoshida (Yasu)]

This bug is a huge nuisance to my workflow when working with large scenes that have tons of parts with CanQuery set to false. It only started happening this past week, so I’m assuming something was changed with the select tool recently.

EDIT: It seems that this bug report’s solution could be potentially related since this issue began around the same time this other bug report was solved.

[kleptonaut]

Thanks for the report, it is indeed caused by that last fix.

I’ll continue posting updates in that thread:

MAJOR Studio Bug. (CanQuery performance issue with default RibbonTool's.)

Issue: When the default RibbonTool’s Select, Scale, Rotate, and Move are used a large performance drop is noticeable in Roblox studio when the cursor is hovering over dense groups of parts. This Studio breaking bug seems to be directly connected to the CanQuery property of Parts. An issue only Roblox engineers can address. Skip to ‘Cause & Reproduction’ for a theory on the cause of this issue & repo. Example: In the clip below you will notice that with the tool selected, there is no performa…