Stroke size goes nuts under 1pt sizes
When drawing a regular line with pen tool and changing the size of the stroke to less than 1pt, it automatically switches to sizes higher than 1pt.
For example, if I want my stroke to be 0.5 pt, and if I select it in a dropdown menu, it will automatically turn into 5pt stroke and that will also be applied on the line. Same thing when entering the value manually with the keyboard - entering 0.5 will automatically convert into 5 and change the stroke to be thicker instead of making it thinner. This only started happening in the newest update of Illustrator - Fall 2017
We have the fix available in the latest release. Please update Illustrator using Adobe Creative Cloud application to the latest build for version Illustrator CC 22.1.
Please refer to our knowledge base FAQ – https://illustrator.uservoice.com/knowledgebase/articles/1844590 if you face difficulty in update.
Or get in touch with us at any of the other support channels – https://helpx.adobe.com/support.html
Ashutosh Chaturvedi | Sr. Quality Engineering Manager – Illustrator
Adobe. Make It an Experience.
Hitesh Sharma commented
Thanks for reporting your concern,
we are not able to reproduce the issue,
Could you please share the recorded animation so that issue can be reproduced.