Hi,

I use a line chart with a linear trend line. 
Example code: https://jsfiddle.net/philipp_foermer/q2c4ajr1/3/

If the mouse is hovered over the trend line, then randomly after some time 
the following java script error appears and the chart view is stuck (no 
hover tooltip anymore for a data point). If no trend line is used, then the 
issue does not occur.

Uncaught TypeError: d.points[c] is undefined
    gvjs_mK 
https://www.gstatic.com/charts/51/i18n/jsapi_compiled_i18n_ui_module__en_gb.js
:896
    gvjs_nK 
https://www.gstatic.com/charts/51/i18n/jsapi_compiled_i18n_ui_module__en_gb.js
:897
    gvjs_yK 
https://www.gstatic.com/charts/51/i18n/jsapi_compiled_i18n_ui_module__en_gb.js
:918
    UX 
https://www.gstatic.com/charts/51/i18n/jsapi_compiled_i18n_ui_module__en_gb.js
:908
    Us 
https://www.gstatic.com/charts/51/i18n/jsapi_compiled_i18n_ui_module__en_gb.js
:904
    gvjs_qK 
https://www.gstatic.com/charts/51/i18n/jsapi_compiled_i18n_ui_module__en_gb.js
:902
    hk 
https://www.gstatic.com/charts/51/i18n/jsapi_compiled_i18n_ui_module__en_gb.js
:1048
    b5 
https://www.gstatic.com/charts/51/i18n/jsapi_compiled_i18n_ui_module__en_gb.js
:946
    gvjs_xi 
https://www.gstatic.com/charts/51/i18n/jsapi_compiled_i18n_default_module__en_gb.js
:166
    dispatchEvent 
https://www.gstatic.com/charts/51/i18n/jsapi_compiled_i18n_default_module__en_gb.js
:164
    b5 
https://www.gstatic.com/charts/51/i18n/jsapi_compiled_i18n_ui_module__en_gb.js
:128
    setTimeout handler*gvjs_.start 
https://www.gstatic.com/charts/51/i18n/jsapi_compiled_i18n_ui_module__en_gb.js
:128
    gvjs_TK 
https://www.gstatic.com/charts/51/i18n/jsapi_compiled_i18n_ui_module__en_gb.js
:946
    Rpa 
https://www.gstatic.com/charts/51/i18n/jsapi_compiled_i18n_ui_module__en_gb.js
:955
    gvjs_xi 
https://www.gstatic.com/charts/51/i18n/jsapi_compiled_i18n_default_module__en_gb.js
:166

Used web browsers:

   - Firefox 96.0.1 (64 Bit) / Windows 10
   - Chrome 97.0.4692.71 (64-Bit) / Windows 10 


Any ideas, if this is an issue in the library or my code misses something?

Best regards,
Philipp Förmer

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