Text not rendered correctly when using multiple player instances

[sebmjoll]

Package

• @lottiefiles/dotlottie-web (core)
• @lottiefiles/dotlottie-react
• @lottiefiles/dotlottie-vue
• @lottiefiles/dotlottie-svelte
• @lottiefiles/dotlottie-solid
• @lottiefiles/dotlottie-wc

Description

If there are multiple players, destroying and recreating them with updated text leads to getting some missing characters. In the attached reproduction html file, the letters "b" and "n" seem to disppear and we get "aaa" rendered instead of "banana". However, when doing the same text updates when only one player is used, all text is correct.

Steps to reproduce

You can use this standalone html page to reproduce the problem:

lottie.html

Here are screen recordings showing that the text is correct when using a single player, but not when using two players:

lottie_1_player_ok.mov

lottie_2_players_bug.mov

Expected behavior

The text is rendered correctly.

Actual behavior

Some characters are not rendered.

Animation file

Here is the .json animation that has been used to create the reproduction recipe html file:

2_lines.json

Environment

• Package version: tested with versions 0.69.0 and 0.73.0 of the lottie player
  Verified on MacOS 26.5 with Chrome (148.0.7778.168) and Firefox (151.0)
  Verified on Linux (CachyOS) with Chrome and Firefox
  Verified on Windows 10 with Chrome, Firefox and Edge

[sebmjoll]

Hi @theashraf. I see that thorvg/thorvg#4406 has been closed after "lottie: improve the robustness font resource usage" (thorvg/thorvg#4413) was merged. Does it mean that the next version of the dotlottie-web player will include the fix ?

[theashraf]

@sebmjoll The thorvg fix landed in dotlottie-web v0.75.0. Give it a try and let me know if the issue still persists. Thanks!

[sebmjoll]

Unfortunately, the problem is still there. If I reload the test page I had added to this issue (https://github.com/user-attachments/files/28055461/lottie.html), I can confirm in the browser network tab that it fetches the version 0.75.0 for both the .js and the .wasm files, but the problem is still present (you can see on the screen recording that the first player still displays "aaa" instead of "banana":

lottie-issue.mov

[sebmjoll]

Is there any way I can help to fix this problem ?

[theashraf]

Sorry @sebmjoll, my bad! I totally missed your comment. It's at the top of my list to fix this week. I'll get back to you shortly.

[sebmjoll]

Awesome, thank you. Let me know if I can help in any way.

[sebmjoll]

@theashraf: thank you very much for your help. I see that the issue has been fixed on the thorvg side in the version 1.1.1 that was released 4 days ago. Do you know when this version will be used in the dotlottie-web player ?