Javascript 为什么这个文本在Chrome的Paper.js中有时呈现不正确？

对于包含的示例，有时引号渲染良好，有时它们显示为方框，有时什么也不显示

一些问题文本包括：

• （TPI 1）
• “委托或专业工程师”

“委托工程文件”似乎总是有效的

我也注意到了与学位符号不一致的行为

提前谢谢你

[["PointText",{"applyMatrix":false,"matrix":[1,0,0,1,21.82495,346.73207],"selected":true,"content":"The TDDs herein are specialty structural component designs and may be part of the Building's deferred or phased submittal documents. As a Truss Design \nEngineer (also referred to in some Jurisdictions as a Delegated or Specialty Engineer), the seal on this Cover Sheet and on any TDD represents an acceptance of\nprofessional engineering responsibility for the design of the single Truss only as depicted on the TDD pursuant to ANSI/TPI 1, the National Design Standard for \nMetal Plate Connected Wood Truss Construction (TPI 1). The Building Designer is responsible for and shall coordinate and review each of the TDDs and all notes \nfor compatibility with the Construction Documents, specifications, written requirements, design loads and load path. Capitalized terms are as defined in TPI 1. \n\n","selectedColor":[0,0.50196,0],"fontSize":"18","leading":18},{"pdfPosition":["Point",126.82495,985.76793],"centerPositionInPdfCoordinates":["Point",773.15503,1048.76793],"centerPositionInRasterCoordinates":["Point",8.15503,-58.76793],"userEmail":"foo@bar.com","fontSizeInPoints":7.2,"bottomLeftPositionInRasterCoordinates":["Point",-638.17505,4.23207]}],["PointText",{"applyMatrix":false,"matrix":[1,0,0,1,24.8473,260.1569],"selected":true,"content":"The TDD(s) (also at times referred to as \"Delegated Engineering Documents\") referenced have been prepared based on the Construction Documents, \nspecifications and written requirements prepared by the Building Designer indicating the nature and character of the Building, its applied load, its load paths and \nthe structural resistance design requirements. The design criteria from the Construction Documents, specifications and written requirements have been transferred \nto DrJ Engineering, LLC (DrJ) by","selectedColor":[0,0.50196,0],"fontSize":"18","leading":18},{"pdfPosition":["Point",129.8473,1126.3431],"centerPositionInPdfCoordinates":["Point",778.66029,1162.3431],"centerPositionInRasterCoordinates":["Point",13.66029,-172.3431],"userEmail":"foo@bar.com","fontSizeInPoints":7.2,"bottomLeftPositionInRasterCoordinates":["Point",-635.1527,-136.3431]}]]